Smile 發問時間: 科學及數學化學 · 4 個月前

Chemistry problem: how to do, thanks.?

Attachment image

1 個解答

評分
  • SC147
    Lv 6
    4 個月前
    最佳解答

    molecular mass of PbSO₄=207.2+32.1+16(4)=303.3

    mass of lead in precipitate(PbSO₄)

         207.2

    = 0.0849 ×--------- = 0.0580

         303.3

    %tage of mass in Pb pigment

     0.0580     

    = ---------- × 100% = 3.87% (‬to 3 sig. fig.) - - - - (A)

     1.50

還有問題?馬上發問,尋求解答。